The Sacred Liturgy is the public worship of the Church. The greatest act of worship in the Church is the Holy Sacrifice of the Mass. The Sacred Liturgy also includes the celebration of the sacraments and of the Divine Office, no rx that public prayer of the Church in which the praise of God is sung unceasingly across the world.
The Constitution on the Sacred Liturgy of the second Vatican Council teaches us:
In the earthly liturgy we take part in a foretaste of that heavenly liturgy which is celebrated in the holy city of Jerusalem toward which we journey as pilgrims, where Christ is sitting at the right hand of God, a minister of the holies and of the true tabernacle; we sing a hymn to the Lord’s glory with all the warriors of the heavenly army; venerating the memory of the saints, we hope for some part and fellowship with them; we eagerly await the Saviour, Our Lord Jesus Christ, until He, our life, shall appear and we too will appear with Him in glory. (n.8)
Concerning the Sacraments, the Catechism of the Catholic Church teaches us:
“The sacraments are efficacious signs of grace, instituted by Christ and entrusted to the Church, by which divine life is dispensed to us. The visible rites by which the sacraments are celebrated signify and make present the graces proper to each sacrament. They bear fruit in those who receive them with the required dispositions.” n.1131
There are seven sacraments, Baptism, Confirmation, Holy Eucharist, Penance, Anointing the Sick, Holy Order and Matrimony.
If you follow the links in the sidebar, you can find information on the sacraments and how we arrange for people to receive them.